Odds ratios and their 95% confidence intervals from stepwise logistic regression analysis with family and social background (main carer, parental education, family income, recipient of subsidy, new arrival, employment status, school sponsoring body, district income) as independent variables and exposure to passive smoking as dependent variables.

<p>^# CSSA (Comprehensive Social Security Allowance)</p><p>Odds ratios and their 95% confidence intervals from stepwise logistic regression analysis with family and social background (main carer, parental education, family income, recipient of subsidy, new arrival, employment status, school sponsoring body, district income) as independent variables and exposure to passive smoking as dependent variables.